K.J. Choi bought a set of Mizuno MP-64 irons off the rack at a Golf Galaxy this week in Ohio to use in the Memorial.

In case you didn't know this, PGA Tour players can get pretty much any club they want for nothing by making a simple phone call.

K.J. Choi knows this as well as anyone... and that's not to say he's greedy by any means, because he's not. The fact is, Choi is a tinkerer.

In Ohio for this week's Memorial Tournament at Muirfield Village, Choi paid a visit to a local Golf Galaxy where he tested several clubs in store before eventually purchasing a set of Mizuno MP-64 irons.

Craziness!

Just to give you an idea of how dialed in Choi and his fellow pros are, listen to this: As the story goes, while testing several types of irons from several manufacturers from the hitting bay, Choi explained to an employee at Golf Galaxy that the swing weight was off on every set of irons with the exception of the Mizuno's be bought.

The employee went and checked the weights and sure enough, Choi was right. The other sets ranged in weight from D2 through D4, while all the MP-64s came in at a consistent D2.

While we always recommend getting properly fit by your local PGA Professional, we suppose there are exceptions -- like when a person can simply grip a set of clubs and tell you the weights are inconsistent.

So how did Choi fare with the new irons? He shot a respectable even-par 72 in the first round.